Title :
Longitudinally two-photon pumped leaky waveguide dye film laser
Author :
He, Guang S. ; Signorini, Raffaella ; Prasad, Paras N.
Author_Institution :
Dept. of Chem., State Univ. of New York, Buffalo, NY, USA
fDate :
1/1/1998 12:00:00 AM
Abstract :
Longitudinally two-photon pumped (TPP) and frequency-upconverted cavity lasing is achieved in a planar leaky waveguide configuration which utilizes a dye-doped polymer film coating on the surface of an optical glass prism. The TPP lasing dye is 4-dimethylamino-N-methylstilbazolium tosylate (DAST) that has been extensively studied as a second order nonlinear optical material. The spectral, temporal, and spatial structures as well as the output-input characteristics of the TPP cavity lasing were measured using a ~170-μm-thick film with a ~2.4-mm pump depth. The leaky waveguide lasing was featured by a nearly single transverse-mode and five axial-modes structure. In our preliminary study, the net conversion efficiency from the absorbed 1064-nm pump pulse energy to the output ~607-nm upconverted cavity lasing energy was found to be ~0.65%. However, this efficiency can be considerably increased by further optimizing the system parameters
Keywords :
dye lasers; filled polymers; laser cavity resonators; laser modes; optical frequency conversion; optical losses; optical planar waveguides; optical polymers; optical pumping; polymer films; solid lasers; two-photon processes; waveguide lasers; 0.65 percent; 1064 nm; 170 mum; 4-dimethylamino-N-methylstilbazolium tosylate; 607 nm; DAST; TPP lasing dye; dye-doped polymer film coating; efficiency; five axial-modes structure; frequency-upconverted cavity lasing; longitudinally two-photon pumped leaky waveguide dye film laser; nearly single transverse-mode; net conversion efficiency; optical glass prism; output upconverted cavity lasing energy; output-input characteristics; planar leaky waveguide configuration; pump depth; pump pulse energy; second order nonlinear optical material; spatial structure; spectral structure; temporal structure; Coatings; Frequency; Laser excitation; Optical films; Optical planar waveguides; Optical waveguides; Planar waveguides; Polymer films; Pump lasers; Waveguide lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
